Simple. Clear. Structured. Eye opening. This new text aims to address a difficult and much feared section of the ACEM Fellowship exam: the arterial blood gas question. Both authors are passionate about teaching, and are actively involved in helping candidates prepare for this difficult section of the exam. The book delivers a simple, clear structure for addressing these questions. Inside are 25 worked examples of the question for candidates to test themselves against, accompanied by referenced comments. There are also explanatory notes for the major concepts in arterial blood gas chemistry, delivered in an exam focused fashion to assist candidates in achieving the best mark possible. MCEM candidates and doctors from the British Isles are not forgotten: kPa equivalents are provided for all the major calculations. This book is useful for anyone seeking to understand ABG interpretation, from final year medical students to registrars sitting final exams. Why wait? Pick it up and approach your exam with confidence